What do you think of Lili? This spelling has kind of grown on me. I especially like Liliana nn Lili.Lili or Lily as a full name? Lili as a nickname for Liliana?
I don't really like Lili- it seems too cutesy and girly to fit most people. I'd pick Lily hands down as a full name, but I can see either working as a nn for Liliana.